\begin{tabular}{@{}l!{\quad}S[table-format = 2.3,table-space-text-post={*}]!{\quad}S[table-format = 2.3,table-space-text-post={*}]!{\quad}S[table-format = 2.3,table-space-text-post={*}]!{\quad}S[table-format = 2.3,table-space-text-post={*}]!{\quad}S[table-format = 2.3,table-space-text-post={*}]!{\quad}S[table-format = 2.3,table-space-text-post={*}]!{\quad}@{}}%
\toprule%
&\multicolumn{1}{c}{Low Pred.}&\multicolumn{1}{c}{2}&\multicolumn{1}{c}{3}&\multicolumn{1}{c}{4}&\multicolumn{1}{c}{High Pred.}&\multicolumn{1}{c}{H{-}L}\\%
\midrule%
\multicolumn{7}{c}{Option Mispricing Score}\\%
\midrule%
Low&{-}0.424***&{-}0.095&0.003&0.069&0.335*&0.759***\\%
2&{-}0.721***&{-}0.141&0.003&0.141&0.509**&1.230***\\%
3&{-}0.935***&{-}0.241*&{-}0.028&0.171&0.580**&1.515***\\%
4&{-}1.506***&{-}0.500***&{-}0.214&0.064&0.650***&2.156***\\%
High&{-}2.348***&{-}0.952***&{-}0.553***&{-}0.238&0.392*&2.740***\\%
H{-}L&{-}1.924***&{-}0.857***&{-}0.555***&{-}0.307***&0.056&1.981***\\\bottomrule%
%
\end{tabular}